So I installed a new polarizer, and the picture didn't change at all. A little about my situation:
The PT-50LC14 was purchased about 3 years ago, as an open box return. After less than a year, the picture began to yellow. The owners of the TV did not address the problem immediately, and the problem worsened. It got to the point that there was a fairly bright yellow 'M' shape on the TV at all times, in addition to the yellowish tint that was occurring previously. After about 2 years of the TV being used in it's worsening yellowish state, there is now a blue 'M' shape, in addition to yellowish tinting of the screen. As I stated in the first line, I replaced the Blue polarizer and did not see a difference in the picture. The blue 'M' shape is still present, along with the yellowish tinting. I will be disassembling the TV again tomorrow to see if I can address any other issues, and I will be replacing the bulb tonight.
My question is this: Is it possible that after a few years of being used with the burned polarizer, the actual screen of the TV has the 'M' shape burned-in? I am not sure if DLP TVs have burn-in issues, but I think this could be the problem. I have also heard that people sometime remove a polarizing film on the screen of their RPTVs, so that may be something I look into
Thanks for any insight